Illuminated dial



Dec. 15,1925- ,566,069

W. C BUCHHOLZ ET AL ILLUMINATED DIAL Filed May 19. 1925 Mil? 1 WITNESSESINVENTQRS William (CB/01111015 ATTORNEYS Patented Dec. 15, 1925.

UNITED STATES 1,566,069 PATENT OFFICE.

WILLIAM C. BUCHHOLZ AND FRANK BUCHHOLZ, OF BROOKLYN, NEW YORKIILLUMINATED DIAL.

Application filed May 19, 1925. Serial No. 31,368.

To all whom it may concern:

Be it known that we, VVILLiAM' C. BUCH- HOLZ and FRANK BUOHIIOLZ, bothcitizens of the United States, and residents of the city of New York,borough of Brooklyn, in the county of Kings and State of New York, haveinvented a new and Improved Illuminated Dial, of which the following isa full, clear, and exact description.

This invention relates to dials and particularly to an improvedilluminated dial for use on radio apparatus, .an object being to.provide a construction which may be readily applied to the cabinet of aradio apparatus and connected upto the various parts thereof withoutre-arranging any of the parts.

Another object of the invention is to provide an illuminated dial forradio apparatus wherein the dial may be illuminated for a short or longtime without illuminating to any appreciable extent the surroundingobjects.

A further object of the invention is to provide an illuminated dialwherein the parts are so arranged that the illuminated lamp is hooded bythe adjusting knob.

A still further object of the invention is toprovide an illuminated dialin connection with a supporting plate and an adjusting knob, the partsbeing so arranged that theentire assemblage may be applied and removedat any time.

In the accompanying drawing- Figure 1 is a sectional. view throughFigure 2 on line 1-1, the same disclosing A an embodiment of theinvention.

Figure 2 is a sectional view through Figure 1 on line 2- 2, said figureillustrating the details of an illuminated dial disclosing theinvention.

Figure 3 is a detail perspective View of a clip embodying certainfeatures of the invention.

Referring to the accompanying drawing by numeral, 1 indicates the panelof a radio apparatus, as for instance, .ang ordinary receiving set. Inproperly adjusting or tuning the set, it is necessary to provide dialsand adjusting means therefor. In many cases, the radio apparatus isplaced where the light is not good, particularly towards evening and,consequently, different means must be provided for securing light sothat the dials may be seen in order to secure the desired adjustment. Inthe present invention, means have been provided which will readilyilluminate the part of the dial to be examined without illuminating muchof the surrounding space or articles.

As illustrated in the drawing, the panel 1 is provided with bores 2, 3and 4, bores 2 and 4 receiving the inwardly extending hollow studs 5 and6 which are preferably integral with the plate 7. preferably made fromrubber, bakelite or other material which may have the same appearance aspanel 1. In forming the plate 7, a socket 8 is formed thereon preferablyintegral therewith. This socket is provided with a metal threaded lining9 and a central contact 10, said lining and contact co-acting with thethreaded sleeve 11 on the lamp 12 and the central contact 13 on the lamp12. The post 5 is provided with a metal bushing or sleeve 14 whichsnugly fitsthe same, said bushing or sleeve being connected by asuitable wire 16 to one of the terminals in the sockets 8 while theopposite terminal in socket 8 is connected by wire 17 to the metalbushing 18, said metal bushing being arranged in the hollow post 5 andheld in place by any desired means, as for instance, friction. The metalcontact plug 19 is also arranged in the post 5 and co-acts with athreaded member 20 for closing the circuit. It will be noted that thesleeve 14 is connected to a suitable source of current ,by wire 21 andcontact plug 19 is connected to the opposite side of the same source ofcurrent by wire 22.

In operation, whenever the lamp 12 is to be lighted, screw 20 is rotatedmanually until the same contacts with the plug 19 whereupon the circuitof the lamp will be closed and it will burn until the circuit has beenopened which may be done by reversing the action of screw 20. The lamp12 is positioned within the hollow part of the knob 23 whereby it ishooded but is permitted to illuminate the window 24 and surroundingobjects as well as that part of the dial 25 which may be seen throughthe window.- Dial 25 is provided with suitable graduations 25 forindicating the relative position of the parts. The dial 25 is rigidlyconnected in any desired manner with a hollow shaft 26 provided with anumber of slits 27 and with a tapering section 28 adapted to be engagedby the tapering section 29 of the sleeve 30. The knob 23 is rigidlyconnected with the sleeve 30 in any The-plate 7 is desired manner, saidsleeve being made of metal and carrying a screw 31 threaded into thethickened portion 32 of the hollow shaft 26. Whenever the screw 31 istightened or rotated in a certain direction, the same will cause thesleeve'30 to telescope over the shaft 26 and as the bevel surface 28moves over the tapering portion 29, the various sections or parts of theshaft 26 between the slits 27 will gradually move in or collapse andthereby pinch tightly the shaft 33 which is connected to the instrumentwithin the radio apparatus which is to be adjusted, as for instance, avariable condenser. The dial 25 is preferably provided with teeth 34with which the small pinion 35 meshes, said pinion being rigidlyconnected to a knob 36 in an desired manner whereby when said knob isrotated the dial may be rotated. In order to 7 hold the plate 7 andassociated parts properly on the panel 2, resilient clips 37 areprovided, said clips being substantially U-shaped as shown in Figure 3and provided with bowed up portions 38 and 39. These bowed up portionsare adapted to fit into the grooves 40 of the respective mem V bers 5and 6.

stantially hollow and open on one face, the

knob being so positioned as to act as a hood for said lamp.

'2. The combination with a radio apparatus having a shaft extendingthrough the front panel, of a plate connected to said panel and,provided with an opening through which said shaft extends, a hollowshaft surrounding the first mentioned shaft, said hollow shaft beingcollapsible so as to pinch said first mentioned shaft, means forcollapsing said hollow shaft, a knob connected with said hollow shaftand acting as a handle therefor and also as a hood, a lamp carriedbysaid plate projecting into said knob, said lamp being positioned toilluminate part of said plate, said plate be- ,ing formed with a windowpositioned to be illuminated by said lam a dial plate secured to saidhollow sha and formed with graduations adapted to move past said windowas the dial plate is rotated, and a manually actuated switch for saidlam for opening and closing the circuit thereof.

3. The combination with a radio ap aratus formed with a panel and a shat extending through the panel, of a plate removably connected to saidpanel,'an actuating member for said shaft, said actuating memberincluding a hollow knob open on the-side facing the plate, said platebeing formed with an electrical socket, a lamp mounted in said socketand projecting to a position within said knob but arranged to illuminatepart of the plate, said plate being formed with a window at the pointilluminated by said lamp, a dial connected with said knob, said dialbeing formed with graduations adapted to be moved past said window, anda manually actuated switch for opening and closing the circuit of saidlamp.

4. The combination with a radio apparatus provided with a dial, of meansfor illuminating said dial, and a knob for actuating said dial, saidknob being formed as a hood for covering part of said lamp so that thesame will illuminate the dial.

5. The combination with a radio apparatus provided with a dial, of aplate normally covering said dial, said plate having a window forexposing part of the dial, means carried by the plate forming anelectrical socket for receiving a lamp, and a knob for adjusting saiddial, said knob being formed with an overhanging apron adapted tooverhang 531d lamp so as to hood the same.

WILLIAM (J. BUCHHOLZ. FRANK BUCHHOLZ.

